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Vulnerability record · CVE-2026-33702 · published 10 April 2026

CVE-2026-33702: Chamilo lms insecure direct object reference vulnerability

Chamilo · Chamilo Lms

Chamilo LMS is a learning management system. Prior to 1.11.38 and 2.0.0-RC.3, Chamilo LMS contains an Insecure Direct Object Reference (IDOR) vulnerability in the Learning Path progress saving endpoint. The file lp_ajax_save_item.php accepts a uid (user ID) parameter directly from $_REQUEST and uses it to load and modify another user's Learning Path progress — including score, status, completion, and time — without verifying that the requesting user matches the target user ID. Any authenticated user enrolled in a course can overwrite another user's Learning Path progress by simply changing the uid parameter in the request. This vulnerability is fixed in 1.11.38 and 2.0.0-RC.3.

7.1 CVSS 3.1 High EPSS 0.43% · top 65.8% CWE-639 · Insecure direct object reference
7.1CVSS 3.1 base score
0.43%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

Chamilo LMS is a learning management system. Prior to 1.11.38 and 2.0.0-RC.3, Chamilo LMS contains an Insecure Direct Object Reference (IDOR) vulnerability in the Learning Path progress saving endpoint. The file lp_ajax_save_item.php accepts a uid (user ID) parameter directly from $_REQUEST and uses it to load and modify another user's Learning Path progress — including score, status, completion, and time — without verifying that the requesting user matches the target user ID. Any authenticated user enrolled in a course can overwrite another user's Learning Path progress by simply changing the uid parameter in the request. This vulnerability is fixed in 1.11.38 and 2.0.0-RC.3.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/chamilo/chamilo-lms/commit/6331d051b4468deb5830c01d1e047c5e5cf2c74f Patch
https://github.com/chamilo/chamilo-lms/commit/bf3f6c6949b5c882b48a9914baa19910417e4551 Patch
https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-3rv7-9fhx-j654 Vendor Advisory
https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-3rv7-9fhx-j654 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-33702), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.